Measurement of the B meson and b quark cross sections at √s =1.8 TeV using the exclusive decay $B^{0}$ →J/ψ $K^{*}$ (892 $)^{0}$

This paper reports the measurement of the B meson and b quark cross sections through the decay chain

B^{0}

→J/ψ

K^{*}

(892

)^{0}

, J/ψ→

μ^{+}

μ^{-}

K^{*}

(892

)^{0}

→

K^{+}

π^{-}

, using 4.3

{pb}^{- 1}

of data collected at the Collider Detector at Fermilab in p¯p collisions at qrts=1.8 TeV. We obtain

σ_{B}

=1.5±0.7(stat)±0.6(syst) μb for

B^{0}

mesons with transverse momentum

P_{T}

>9.0 GeV/c and rapidity ‖y‖<1.0. Using this result, we find

σ_{b}

=3.7±1.6(stat)±1.5(syst) μb for b quarks with

P_{T}

>11.5 GeV/c and rapidity ‖y‖<1.0. The b quark cross section is compared to next-to-leading order QCD calculations and previous measurements.

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Measurement of the B meson and b quark cross sections at √s =1.8 TeV using the exclusive decay B0→J/ψK*(892)0